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Lighten up const_prop_lint, reusing const_prop

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Aïssata 2022-07-12 12:17:58 +00:00
parent 2f320a224e
commit 68b433a089
2 changed files with 19 additions and 222 deletions
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12
compiler/rustc_mir_transform/src/const_prop.rs
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@ -155,18 +155,18 @@ impl<'tcx> MirPass<'tcx> for ConstProp {
}
}
struct ConstPropMachine<'mir, 'tcx> {
pub struct ConstPropMachine<'mir, 'tcx> {
/// The virtual call stack.
stack: Vec<Frame<'mir, 'tcx>>,
/// `OnlyInsideOwnBlock` locals that were written in the current block get erased at the end.
written_only_inside_own_block_locals: FxHashSet<Local>,
pub written_only_inside_own_block_locals: FxHashSet<Local>,
/// Locals that need to be cleared after every block terminates.
only_propagate_inside_block_locals: BitSet<Local>,
can_const_prop: IndexVec<Local, ConstPropMode>,
pub only_propagate_inside_block_locals: BitSet<Local>,
pub can_const_prop: IndexVec<Local, ConstPropMode>,
}
impl ConstPropMachine<'_, '_> {
fn new(
pub fn new(
only_propagate_inside_block_locals: BitSet<Local>,
can_const_prop: IndexVec<Local, ConstPropMode>,
) -> Self {
@ -816,7 +816,7 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
/// The mode that `ConstProp` is allowed to run in for a given `Local`.
#[derive(Clone, Copy, Debug, PartialEq)]
enum ConstPropMode {
pub enum ConstPropMode {
/// The `Local` can be propagated into and reads of this `Local` can also be propagated.
FullConstProp,
/// The `Local` can only be propagated into and from its own block.